Amazon CEO Jeff Bezos and his wife, MacKenzie, are divorcing, ending a 25-year marriage that played a role in the creation of an e-commerce company that made Bezos one of the world’s wealthiest people.

Tough laws and patriarchal cultural norms that overwhelmingly see mothers granted sole custody after a divorce — 80 percent of the time, according to official figures — mean that fathers rarely see their children again.